Circuit with voltage drop element
AssigneeHuawei Technologies Co., Ltd.
InventorGiuseppe Gramegna
Life of this patent
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Abstract
A circuit comprises: a circuit input; a circuit output; at least one passive feedback loop coupled between the circuit output and the circuit input; an active element, coupled in a feed-forward path of the circuit between the circuit input and the circuit output and configured to drive the at least one feedback loop in order to establish a function of the circuit, wherein the feed-forward path of the circuit comprises a second node (Vx) and a first node which are internal nodes of the active element and which are coupled between the circuit input and the circuit output, wherein the first node is configured to have a first voltage, the first voltage being a function of the circuit output, wherein the active element comprises a first voltage drop element coupled between the second node (Vx) and the first node.
Claims22
A circuit, comprising:
- a circuit input;
- a circuit output;
- at least one passive feedback loop coupled between the circuit output and the circuit input;
- and
- an active circuit, coupled between the circuit input and the circuit output and configured to drive the at least one feedback loop,
- wherein the active circuit comprises a second node and a first node which are internal nodes of the active circuit and which are coupled between the circuit input and the circuit output,
- wherein the active circuit comprises a first voltage drop circuit coupled between the second node and the first node,
- wherein the first voltage drop circuit is configured to decouple a DC level at the first node from a DC level at the second node and configured to provide the DC level at the first node independently from the DC level at the second node, and
- wherein the first voltage drop circuit is adjustable and configured to provide an adjustable voltage drop between the first node and the second node.
An analog baseband circuit, comprising:
- a programmable gate array (PGA);
- a low pass filter (LPF);
- and
- a driver, which are DC coupled in series,
- wherein each of the PGA, LPF and driver (DRV) comprises:
- a circuit comprising:
- a circuit input;
- a circuit output;
- at least one passive feedback loop coupled between the circuit output and the circuit input;
- and
- an active circuit, coupled between the circuit input and the circuit output and configured to drive the at least one feedback loop,
- wherein the active circuit comprises a second node and a first node which are internal nodes of the active circuit and which are coupled between the circuit input and the circuit output,
- wherein the active circuit comprises a first voltage drop circuit coupled between the second node and the first node,
- wherein the first voltage drop circuit is configured to decouple a DC level at the first node from a DC level at the second node and configured to provide the DC level at the first node independently from the DC level at the second node.
A circuit, comprising:
- a circuit input;
- a circuit output;
- at least one passive feedback loop coupled between the circuit output and the circuit input;
- and
- an active circuit, coupled between the circuit input and the circuit output and configured to drive the at least one feedback loop,
- wherein the active circuit comprises a pre-amplifier coupled to the circuit input, a post-amplifier coupled to the circuit output, and a first voltage drop circuit coupled between a first node and a second node,
- wherein the first node is an input node of the post-amplifier and the second node is an output node of the pre-amplifier,
- wherein the pre-amplifier and the post-amplifier are two neighboring amplifier stages, and
- wherein the first voltage drop circuit is configured to provide a DC level at the first node independently from a DC level at the second node.
Dependencies are inferred from the claim text.